Occupancy sensing

Occupancy sensing

Motion sensors that control lights according to space occupancy. Passive infrared sensors are the most common. Ultrasonic sensors work better in places with partitions. Sensors have sensitivity and time-out adjustments to fine-tune their use. Wall box sensors with internal switches or dimmers are used for small rooms. Multiple sensors are needed for larger spaces. Energy credit for their use are substantial, and the payback is short for retrofit applications.
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Applications include non-contact temperature measurements such as tympanic thermometers, automobile climate control and occupancy sensing, process temperature monitoring, gas analysis in the medical, automotive, and petroleum industries, hazard control including flame and explosion detection, and horizon sensors for science and space.
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Occupancy sensing technologies can deliver value beyond optimizing lighting and HVAC; they can also track where customers move in the store to aid analysis of shopping behavior.
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The third scenario was based on dedicated occupancy sensing in each workstation with a range of time delays--30, 20, 10, one and zero minutes.
The next generation of occupancy sensing? Two studies point toward more nimble systems for office settings
The Blackfin Low Power Imaging Platform (BLIP) leverages the ADSP-BF707 Blackfin processor as well as Analog Devices' optimized software libraries for video occupancy sensing. The ADSP-BF706 EZ-KIT Mini development platform targets power-sensitive embedded applications from portable audio to sound processing and effects.
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Each UP32x supports occupancy sensing, two (2) digital inputs for condensate switch, dirty filter or other fault condition, and an advanced remote sensor bus.
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Their experimental studies not only demonstrate the feasibility of IT based implicit occupancy sensing but also reveal that the IT based implicit methods are able to detect beyond simple occupant counts: they are also able to detect occupants' location and activities.
Development of empirical office occupancy profiles based on information technology sensor systems
The problem can disable the front airbags, seatbelt pretensioners and the Automatic Occupancy Sensing module.
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Bruce Nordman of the Lawrence Berkeley National Laboratory, plus Ken Christensen of the Department of Computer Science and Engineering at the University of South Florida, and other colleagues from those institutions and the University of Puerto Rico at Arecibo, explain how implicit occupancy sensing can be undertaken using existing IT infrastructure.
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Occupancy Sensing: A sensor-activated lighting system, especially for areas such as bathrooms also help conserve energy.
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Lastly, Control Scenario 6, "Wireless Full Dimming," provided the most robust control system, with full daylight dimming, high-end trim dimming, lumen maintenance dimming, and occupancy sensing in all major spaces.
Wireless lighting control: a life cycle cost evaluation of multiple lighting control strategies
These systems do have a higher first cost than occupancy sensing or timeclock control but can provide greater or additional ongoing benefits.
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